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Tillämpad ekologi
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Dr. Walker and Dr. Corbet make a signal contribution in gathering together all available information on the dragonflies of Canada and Alaska. The order as a whole and the zygoptera …
Dr. Walker makes a signal contribution in gathering together all available information on the dragonflies of Canada and Alaska. The order as a whole and the zygoptera are covered. …
The intriguing Bird’s Nest Fungi (Nidulariaceae) of forest, meadow, and garden have been familiar to botanists since 1601, but only relatively recently has the significance of …
Dr. Walker makes a signal contribution in gathering together all available information on the dragonflies of Canada and Alaska. The order as a whole and the zygoptera are covered. …
This volume reports all the information presently available from the fifty-seven regeneration surveys carried out to the present by government and private agencies within the …
Hydroids of the Pacific Coast of Canada and the United States is an attempt to give a brief description, with figures, of every hydroid species known to occur along the Pacific …
The lichen genus Cladonia includes some of the very common ground cover plants in the United States and Canada. Before the compiling of this volume, the published results of …
Permafrost is the thermal condition of the earth’s crust when its temperature has been below 32°F continuously for a number of years. Half of Canada’s land surface lies in the …